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EN 1.4818 Stainless Steel vs. EN 1.4418 Stainless Steel

Both EN 1.4818 stainless steel and EN 1.4418 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4818 stainless steel and the bottom bar is EN 1.4418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
16 to 20
Fatigue Strength, MPa 280
350 to 480
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480
530 to 620
Tensile Strength: Ultimate (UTS), MPa 700
860 to 1000
Tensile Strength: Yield (Proof), MPa 330
540 to 790

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1050
870
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.8
Embodied Energy, MJ/kg 44
39
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 22
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 270
730 to 1590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
31 to 36
Strength to Weight: Bending, points 23
26 to 28
Thermal Diffusivity, mm2/s 4.5
4.0
Thermal Shock Resistance, points 15
31 to 36

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.060
Cerium (Ce), % 0.030 to 0.080
0
Chromium (Cr), % 18 to 20
15 to 17
Iron (Fe), % 65.6 to 71.8
73.2 to 80.2
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
0.8 to 1.5
Nickel (Ni), % 9.0 to 11
4.0 to 6.0
Nitrogen (N), % 0.12 to 0.2
0 to 0.020
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 1.0 to 2.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015